[This bug is NOT targeted to the upcoming trixie release] Please keep this issue open in the bug tracker for the package it was filed for. If a fix in another package is required, please file a bug for the other package (or clone), and add a block in this package. Please keep the issue open until the package can be built in a follow-up test rebuild. The package fails to build in a test rebuild on at least amd64 with gcc-15/g++-15, but succeeds to build with gcc-14/g++-14. The severity of this report will be raised before the forky release. The full build log can be found at: http://qa-logs.debian.net/2025/02/16/amd64exp/zuo_1.9-1_unstable_gccexp.log.gz The last lines of the build log are at the end of this report. To build with GCC 15, either set CC=gcc-15 CXX=g++-15 explicitly, or install the gcc, g++, gfortran, ... packages from experimental. apt-get -t=experimental install g++ GCC 15 now defaults to the C23/C++23 standards, exposing many FTBFS. Other Common build failures are new warnings resulting in build failures with -Werror turned on, or new/dropped symbols in Debian symbols files. For other C/C++ related build failures see the porting guide at http://gcc.gnu.org/gcc-15/porting_to.html [...] dpkg-source --before-build . dpkg-buildpackage: info: host architecture amd64 debian/rules clean dh clean debian/rules override_dh_auto_clean make[1]: Entering directory '/build/reproducible-path/zuo-1.9' dh_auto_clean rm -rf build rm -rf Makefile _zuo.db config.log config.status image_zuo.c image_zuo.dep to-install/ to-run/ zuo make[1]: Leaving directory '/build/reproducible-path/zuo-1.9' dh_clean rm -f debian/debhelper-build-stamp rm -rf debian/.debhelper/ rm -f -- debian/zuo.substvars debian/files rm -fr -- debian/zuo/ debian/tmp/ find . \( \( \ \( -path .\*/.git -o -path .\*/.svn -o -path .\*/.bzr -o -path .\*/.hg -o -path .\*/CVS -o -path .\*/.pc -o -path .\*/_darcs \) -prune -o -type f -a \ \( -name '#*#' -o -name '.*~' -o -name '*~' -o -name DEADJOE \ -o -name '*.orig' -o -name '*.rej' -o -name '*.bak' \ -o -name '.*.orig' -o -name .*.rej -o -name '.SUMS' \ -o -name TAGS -o \( -path '*/.deps/*' -a -name '*.P' \) \ \) -exec rm -f {} + \) -o \ \( -type d -a \( -name autom4te.cache -o -name __pycache__ \) -prune -exec rm -rf {} + \) \) debian/rules binary dh binary dh_update_autotools_config dh_autoreconf find ! -ipath "./debian/*" -a ! \( -path '*/.git/*' -o -path '*/.hg/*' -o -path '*/.bzr/*' -o -path '*/.svn/*' -o -path '*/CVS/*' \) -a -type f -exec md5sum {} + -o -type l -printf "symlink %p " > debian/autoreconf.before grep -q ^XDT_ configure.ac autoreconf -f -i find ! -ipath "./debian/*" -a ! \( -path '*/.git/*' -o -path '*/.hg/*' -o -path '*/.bzr/*' -o -path '*/.svn/*' -o -path '*/CVS/*' \) -a -type f -exec md5sum {} + -o -type l -printf "symlink %p " > debian/autoreconf.after dh_auto_configure ./configure --build=x86_64-linux-gnu --prefix=/usr --includedir=\${prefix}/include --mandir=\${prefix}/share/man --infodir=\${prefix}/share/info --sysconfdir=/etc --localstatedir=/var --disable-option-checking --disable-silent-rules --libdir=\${prefix}/lib/x86_64-linux-gnu --runstatedir=/run --disable-maintainer-mode --disable-dependency-tracking checking whether make sets $(MAKE)... yes checking for gcc... gcc checking whether the C compiler works... yes checking for C compiler default output file name... a.out checking for suffix of executables... checking whether we are cross compiling... no checking for suffix of object files... o checking whether the compiler supports GNU C... yes checking whether gcc accepts -g... yes checking for gcc option to enable C11 features... none needed configure: zuo libraries to embed: "zuo" configure: creating ./config.status config.status: creating Makefile config.status: creating main.zuo dh_auto_build make -j8 make[1]: Entering directory '/build/reproducible-path/zuo-1.9' gcc -O2 -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/zuo-1.9=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -Wdate-time -D_FORTIFY_SOURCE=2 -DZUO_LIB_PATH='"'"./lib"'"' -o zuo ./zuo.c -Wl,-z,relro -Wl,-z,now ./zuo.c: In function ‘zuo_init_signal_handler’: ./zuo.c:5585:17: error: assignment to ‘__sighandler_t’ {aka ‘void (*)(int)’} from incompatible pointer type ‘void (*)(void)’ [-Wincompatible-pointer-types] 5585 | sa.sa_handler = zuo_signal_received; | ^ ./zuo.c:5565:13: note: ‘zuo_signal_received’ declared here 5565 | static void zuo_signal_received() { | ^~~~~~~~~~~~~~~~~~~ In file included from /usr/include/x86_64-linux-gnu/sys/wait.h:36, from ./zuo.c:23: /usr/include/signal.h:72:16: note: ‘__sighandler_t’ declared here 72 | typedef void (*__sighandler_t) (int); | ^~~~~~~~~~~~~~ make[1]: *** [Makefile:33: zuo] Error 1 make[1]: Leaving directory '/build/reproducible-path/zuo-1.9' dh_auto_build: error: make -j8 returned exit code 2 make: *** [debian/rules:6: binary] Error 25 dpkg-buildpackage: error: debian/rules binary subprocess returned exit status 2